1 Introduction
General | |
MATP | Maximum allowable transmit power |
CTP | Constraint target probability |
RSS | Received signal strength |
PB, PN, SB, SN | Primary base station, primary network, secondary |
base station, secondary network | |
B
| Bandwidth for PN operation |
P
C
| Constraint probability in (4) |
\(\dot {\mathrm {P}}_{\text {C}}\)
| Constraint target probability (CTP) |
(Z)
| Type of MATP such as MATP-Z where Z is P, |
C, or I
| |
μ and ν
| Mean and variance |
C
down
| Downlink capacity for SN |
\(\bar {C}_{\text {down}}\)
| Average downlink capacity for SN |
Location and distance | |
r
c,p
| Radius of coverage of the PN |
r
c,s
| Radius of coverage of the SN |
d
| Distance from PB |
Δ
d
g
| Additional separation radius |
d
g
| =r
c,p
+Δ
d
g
: radius of extended PN coverage |
\(d_{\text {PU}-\text {SU}_{n}}\phantom {\dot {i}\!}\)
| Distance between the PB and the SU
n
|
\(d_{\text {SU}_{0}}\phantom {\dot {i}\!}\)
| Distance between the PB and the SB |
\(\hat {d}_{\text {SU}_{0}}^{(Z)}\phantom {\dot {i}\!}\)
| Estimated \(d_{\text {SU}_{0}}\phantom {\dot {i}\!}\)
|
d
m (or \(d_{\mathrm {m}}^{(Z)}\)) | Transmit decision margin |
Transmission, propagation, and reception | |
\({T}_{\text {PU}_{0}}\phantom {\dot {i}\!}\)
| Transmit power of the PB in dB |
\({T}_{\text {SU}_{0}}\phantom {\dot {i}\!}\)
| Transmit power of the SB in dB |
\(T_{\text {SU}_{0}, \text {max}}^{(Z)}\phantom {\dot {i}\!}\)
| MATP |
T
m (or \(T_{\mathrm {m}}^{(Z)}\)) | Transmit power margin |
D
T
| Binary transmit decision variable (0 or 1) |
L(d) | Path loss |
\(X_{\text {PU}_{0} \rightarrow \text {SU}_{n}, \sigma _{x}}\phantom {\dot {i}\!}\)
| Attenuation due to shadowing in the link |
between PU0 and SU
n
| |
\({\sigma _{x}^{2}}\)
| Variance of log-normal shadowing model |
\({R}_{\text {PU}_{0} \rightarrow \text {SU}_{n}}\phantom {\dot {i}\!}\)
| RSS level from the PB transmission at SU
n
|
\(\bar {R}_{\text {PU}_{0} \rightarrow \text {SU}_{n}}\phantom {\dot {i}\!}\)
| RSS level without the shadowing effect |
\(\hat {R}^{(Z)}\)
| Estimated \(\bar {R}_{\text {PU}_{0} \rightarrow \text {SU}_{0}}\phantom {\dot {i}\!}\)
|
I
PU
| Interference level at the PU receiver at the edge |
of PN coverage | |
\(\bar {I}_{\text {PU}}\)
| Interference level without the shadowing effect |
I
th
| Allowable interference level at the PU |
PU and SU | |
PU0
| PB |
SU0
| SB |
SU
n
(n=1,⋯,N
s
) |
nth SU terminal |
N
s
| Number of SU terminals |